On 8/23/07, Casper.Dik at sun.com <Casper.Dik at sun.com> wrote: > > >Quoth Brandorr on Mon, Aug 20, 2007 at 11:04:42AM -0400: > >> I remember hearing noise, a few years back, about Sun working on the > >> ability to patch running systems, such that the patching would not > >> require any downtime. (IE: No reboot required for the patches to go > >> into affect. This included if I recall kernel patches.) > >> > >> Is my memory faulty? Was this every in the works? If so, what is the > >> status? > > > >Last year an intern made a prototype which could restart userland, which > >would allow patches to be put into effect without POSTing. It wasn't > >product-ready and I don't recall it being discussed outside of Sun. It > >wouldn't allow for kernel patches anyway. For those the only thing > >I can think of is a paper I saw at Usenix a few years ago. It might > >have been from IBM. > > > There was a different "hotpatching" technology we developed which would > alllow hot patching running systems; but even though the mechanism was > created, no such patches were ever released. > > If you restart userland, then it is not unlikely that you can also > unload a few modules (such as NFS, all non root fs modules, device drivers > for devices not used until userland starts)
Is this anything that might ever see the light of day, or should I just keep on walking. ;) -- - Brian Gupta http://opensolaris.org/os/project/nycosug/
